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Software Application Development PS I2C ZedBoard
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Related

PS I2C ZedBoard

Former Member
Former Member over 11 years ago

I am trying to get the I2C 0 Peripheral to work on the ZedBoard. I have set up I2C 0 to connect the MIO10 and MIO11 pins to the PMOD header. I then built the linux kernel using the linux-xlnx git source. When in linux any command that is used on the i2c times out.

The following are console outputs:

zynq> i2cdetect -l 0
i2c-0   i2c             XILINX I2C at e0004000            I2C adapter


zynq> i2cdetect 0
Error: Can't use SMBus Quick Write command on this bus

zynq> i2cdetect -r 0
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-0 using read byte commands.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          xi2cps e0004000.ps7-i2c: timeout waiting on completion
-- xi2cps e0004000.ps7-i2c: timeout waiting on completion
-- xi2cps e0004000.ps7-i2c: timeout waiting on completion
-- xi2cps e0004000.ps7-i2c: timeout waiting on completion
-- xi2cps e0004000.ps7-i2c: timeout waiting on completion
-- xi2cps e0004000.ps7-i2c: timeout waiting on completion
-- xi2cps e0004000.ps7-i2c: timeout waiting on completion
-- xi2cps e0004000.ps7-i2c: timeout waiting on completion
-- xi2cps e0004000.ps7-i2c: timeout waiting on completion
-- xi2cps e0004000.ps7-i2c: timeout waiting on completion
-- xi2cps e0004000.ps7-i2c: timeout waiting on completion
-- xi2cps e0004000.ps7-i2c: timeout waiting on completion
-- xi2cps e0004000.ps7-i2c: timeout waiting on completion


...there is more but i cut it off

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  • zedhed
    0 zedhed over 11 years ago

    Hi cuboard,

    Is this related to what is going on in these Xilinx forum posts?

    http://forums.xilinx.com/t5/Embedded-Linux/Microzed-i2c/m-p/395783

    http://forums.xilinx.com/t5/Embedded-Linux/Howto-compile-Zynq-Linux-with-I2C-driver/m-p/376793#M7209

    Looks like they might be using a devicetree entry like this rather than the one you are using:

    ps7-i2c@e0004000 {
                            compatible = "xlnx,ps7-i2c-1.00.a";
                            reg = <0xE0004000 0x1000>;
                            interrupts = <0 25 4>;
                            interrupt-parent = <0x2>;
                            bus-id = <0>;
    tttclock-names = "i2c9_aper";
    tttclocks = <0x3 39>;
                            input-clk = <111111111>;
                            i2c-clk = <100000>;t
                            #address-cells = <1>;
                            xlnx,i2c-clk-freq-hz = <0x69f6bcb>;
    ttt#size-cells = <0>;
                    };

    Have you tried an entry like this instead?

    Regards,

    -Kevin

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  • zedhed
    0 zedhed over 11 years ago

    Hi cuboard,

    Is this related to what is going on in these Xilinx forum posts?

    http://forums.xilinx.com/t5/Embedded-Linux/Microzed-i2c/m-p/395783

    http://forums.xilinx.com/t5/Embedded-Linux/Howto-compile-Zynq-Linux-with-I2C-driver/m-p/376793#M7209

    Looks like they might be using a devicetree entry like this rather than the one you are using:

    ps7-i2c@e0004000 {
                            compatible = "xlnx,ps7-i2c-1.00.a";
                            reg = <0xE0004000 0x1000>;
                            interrupts = <0 25 4>;
                            interrupt-parent = <0x2>;
                            bus-id = <0>;
    tttclock-names = "i2c9_aper";
    tttclocks = <0x3 39>;
                            input-clk = <111111111>;
                            i2c-clk = <100000>;t
                            #address-cells = <1>;
                            xlnx,i2c-clk-freq-hz = <0x69f6bcb>;
    ttt#size-cells = <0>;
                    };

    Have you tried an entry like this instead?

    Regards,

    -Kevin

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